Posts Tagged ‘ochronose exogène’
Exogenous Ochronosis (EO) (For Professionals)
Wednesday, April 17th, 2013Causes: resorcinol, phenol and mercury. Risk factors: olive or dark skin, failure to use sunprotection. Occurs with prolonged use of hydroquinone (HQ) at a concentration of more than 3%. FDA banned OTC (Over-the-counter) sale due to toxicology issues and uncertain long term cancer risk. However, it is considered safe when used at a concentration of […]
Using Hydroquinone and Ochronosis
Wednesday, May 16th, 2012Rule No: 1 Recognize melasma (chloasma, pregnancy mask) Rule out the differential diagnoses: lichen planus pigmentosus (darker skin patients (Indians), pigmentation is often seen behind the ears) Hori’s Nevus Drug-induced hyperpigmentation ochronosis Rule No: 2 If the patient reports worsening of melasma with hydroquinone use, consider seriouslsy the diagnosis of ochronosis: Stage 3 ochronosis is […]
